Paraffin wax, with ceresin congealing point about 60 °C

Paraffin wax (or petroleum wax) is a soft colorless solid, derived from petroleum, coal or shale oil, that consists of a mixture of hydrocarbon molecules containing between twenty and forty carbon atoms.

P 1318 (OTTO) Paraffin wax, with ceresin congealing point about 60 °C Cas 8002-74-2 - used to impregnate tissue prior to sectioning thin samples of tissue.